The role of insulating materials is to isolate live parts of electrical equipment at different potentials. The insulating material has high insulation resistance and compressive strength, and can avoid accidents such as leakage and breakdown. Furthermore, it has better heat resistance, avoids aging and deterioration due to long-term overheating, and has the characteristics of good thermal conductivity, moisture resistance and lightning protection, high mechanical strength, and convenient processing.
Scope of test:
Plastic insulating materials: injection-type insulating plastics, high electrical performance insulating plastics, high-frequency insulating plastics, chemical corrosion-resistant insulating plastics, moisture-resistant insulating plastics, impact-resistant insulating plastics, arc-resistant insulating plastics, leakage-resistant insulating plastics, high-temperature insulating plastics Plastics, ammonia-free insulating plastics, flame-resistant insulating plastics, etc.;
Inorganic insulating materials: mica, porcelain, asbestos, marble, glass, sulfur, etc. Used for winding insulation of motors and electrical appliances, switch base plates and insulators, etc.;
Organic insulating materials: rubber, resin, shellac, cotton yarn paper, hemp, silk, rayon tube, etc. For the manufacture of insulating varnish, outer insulation of winding wires, etc.;
Hybrid Insulation: Formed insulation processed from two insulation materials. Bases, shells, etc. for electrical appliances;
Test items:
Physical properties: density, thickness, size, water absorption, toughness, etc.;
Mechanical properties: hardness, stiffness, elastic modulus, elongation at break, friction properties, tensile, compressive strength, etc.;
Thermal properties: thermal stability, melting temperature, expansion coefficient, oxidation index, etc.;
Electrical properties: electrical insulation, dielectric constant, dielectric loss, etc.;
Environmental performance: acid resistance, alkali resistance, salt resistance, solvent resistance, etc.;
Analysis items: component analysis, principal component analysis, comparative analysis, unknown substance analysis, map analysis, failure analysis, full component analysis, material identification, formula restoration, etc.
Some testing standards:
GB/T 10064 Test method for determination of insulation resistance of solid insulating materials
GB/T 10580 Standard conditions for solid insulating materials used before and during the test
B/T 10581 Test methods for electrical resistance and resistivity of insulating materials at elevated temperatures
GB/T 10582 Electrical insulating materials-Test method for determination of electrolytic corrosion caused by insulating materials
GB/Z 1094.14 Power Transformers Part 14: Design of Liquid-Immersed Transformers Using High Temperature Insulating Materials
GB/T 11016 Plastic insulation and rubber insulation telephone soft
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